NYTimes – Trying to Close a Knowledge Gap, Word by Word

Amid a political push for government-funded preschool for 4-year-olds, a growing number of experts fear that such programs actually start too late for the children most at risk. That is why Deisy Ixcuna-González, the 16-month-old daughter of Guatemalan immigrants, is wearing a tiny recorder that captures every word she hears and utters inside her family’s cramped apartment one day a week.